B&B Electronics GW-7553 - Manual - Manual (Page 46)

B9 B8”). In this message, the user can know the value of DI0 & DI1 is “0” in
the GW-7553.
--Send output data to write DI of the GW-7553 by the PROFIBUS Master
The user needs to set “0xFE” & “0xDC” in byte 3 & byte 4 of output data
area in the configuration program “SyCon” and then set the value of the first
byte from 0 to 1 to trigger the data output command.
--Send Command to read DI of the GW-7553 again
Now the user can input command (” 01 02 00 00 00 10”) in MBRTU and
click button to send Modbus command: “01 02 00 00 00
10 79 C6” again. Then MBRTU can receive response message (” 01 02 02 FE
DC F8 41”). In this message, the user can know the value of DI0 & DI1 have
changed into “0xFE” & “0xDC” in the GW-7553, as shown in figure 43, 44,
45 & table 15.
Figure 43 Send Modbus command to read DI of the GW-7553
GW-7553 PROFIBUS/Modbus TCP Gateway User Manual (Version 1.00, Dec/2008) PAGE: 46